Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos domicílios têm uma renda familiar mediana de $58,491?
 ###Tabelas: CREATE TABLE table_of_theophoric_names_with_"yah"_and_"yahu"_suffixes (table_of_theophoric_names_with_"yah"_and_"yahu"_suffixes_id AUTO_INCREMENT PRIMARY KEY, Strong's # VARCHAR, Hebrew word VARCHAR, Strong's Transliteration VARCHAR, Strong's Words Compounded VARCHAR, English Spelling VARCHAR) CREATE TABLE comparative_methods (comparative_methods_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Number of sequences Number of sequences: . VARCHAR, Alignment Alignment: predicts an alignment , . VARCHAR, Structure Structure: predicts structure , . VARCHAR, Knots Knots: Pseudoknot prediction, . VARCHAR, Link VARCHAR) CREATE TABLE narrative_structure (narrative_structure_id AUTO_INCREMENT PRIMARY KEY, POV character VARCHAR, Game VARCHAR, Clash VARCHAR, Storm VARCHAR, Feast VARCHAR, Dance VARCHAR) CREATE TABLE 1850_1871 (1850_1871_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Wheel arrangement VARCHAR, Manufacturer VARCHAR, Year made VARCHAR, Quantity made VARCHAR, Quantity preserved VARCHAR, Year(s) withdrawn VARCHAR) CREATE TABLE minnesota_counties_ranked_by_per_capita_income (minnesota_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT)  
SELECT Number of households FROM minnesota_counties_ranked_by_per_capita_income WHERE Median family income = $58,491